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二次函数培优题：只需画一幅图就分出a、b、m、n的大小
画两条二次函数图就能分出四个字母的大小。
二次函数培优题133/147
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App02:41打开App观看
画两条二次函数图就能分出四个字母的大小。
App05:15App04:16App03:07App04:08App05:06App07:16App03:50App07:05App02:58App06:20App03:38App02:42App08:36App10:38App07:35App02:41
